my hollander says the drums [front & rear] fit back to 1935 and were used in many chrysler, plymouth, dodge and desoto vehicles as well as the 1/2 ton dodge and plymouth truck up to the 47 model year. then it jumps to truck only for model years 48-56. the passenger car line seems to split apart from the 1/2 ton truck line at this point. this would be in line with what gene has said. remember, i just looked up the drums, but i'm sure if the drums interchange, the rest does too. it seems for some reason, the pickup and passenger car lines went their seperate ways untill about the mid 60's, then started interchanging again. i'm basing this on the info from my wagner master catalog that covers from about 1950- sometime in the very late 90's.